The Birth Story of a Qualified Stainless Steel Insulated Cup (Part Four)

There are stories in the cup, and warmth in life. Hello everyone, "Dong Dong's Cup Talk" is here. With the increasing number of followers on my Xiaohongshu account "Dong Dong Talks Cups," I have been receiving more and more inquiries from friends in the comments. https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlHowever, I've noticed a common issue in these inquiries: most people tend to focus on the undesirable aspects of the inner liner of newly purchased insulated cups, while very few raise concerns about other parts or accessories.

Today, I will explain in detail what a qualified insulated cup should look like. Beyond quality requirements for the inner liner, what other standards should be met for other parts and accessories? https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlSince there is a lot of information to share, I will break it down into multiple independent posts for everyone.

5. Lid Function Requirements

Qualified Standards:

- Flip-top Lid Cups: The button for opening the lid should have moderate resistance, with strong and smooth recoil. https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlWhen closed, there should be a crisp "click" sound, and the seal should be tight.

- Screw-top Lid Cups: The threads should be smooth, with no resistance when tightening. The sealing ring should be installed evenly and should not detach after repeated opening and closing.

- Direct-drink or Button-open Lid Cups: https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlThe opening and closing mechanism should operate smoothly, without jamming, and the locking device should function effectively.

Defective Performance: Issues such as jamming or lack of force when opening the lid, the lid popping open easily after being lightly touched (indicating poor sealing), or a loose and dull sound when pressing the button. https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlThese are all signs of inadequate structural design or assembly precision in internal components such as springs and clasps.

6. Inner Wall Scratches and Stainless Steel Weld Line Requirements

- Inner Wall Scratches: As mentioned earlier, https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlany scratches easily visible to the naked eye under normal lighting conditions are considered unacceptable.

- Stainless Steel Weld Line:

- Qualified Standards: A seamless, one-piece body is ideal. If a weld line exists (commonly seen where the bottom connects to the body), it should be smooth, even, and consistent in color with the surrounding inner liner, with no roughness.

- Negative Cases: Rough, raised, https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmldiscolored (black or yellow) weld lines. These indicate outdated or poor welding techniques.

7. Packaging Requirements and Outer Carton Standards

Qualified Standards:

- Inner Packaging: The cup should be secured with new, clean, and environmentally friendly paper or foam trays (varies by region). The cup itself should be wrapped in an OPP or PE bag to prevent scratches. The color box should have clear printing and be made of sturdy material.

- Outer Carton Standards: https://www.zhanyict.com/en/ProductsDetail-VB-10532.htmlThe outer carton material must provide sufficient compressive strength (e.g., A=A corrugated cardboard for export). Sealing tape should be strong and secure. The carton should be clearly printed with product information, quantity, gross weight, net weight, and labels such as "This Side Up," "Keep Dry," and "Handle with Care."